Within three years, from 1805 to 1808, Beethoven composed some of his greatest works: the oratorio of "The Mount of Olives," the opera of "Fidelio," and the two noble symphonies, "Pastorale" and "Eroica," besides a large number of concertos, sonatas, songs, and other occasional pieces. However gloomy the externals of his life, his creative activiti